Reaction mass of cobalt and copper and iron

Water solubility

Administrative data

Endpoint:

water solubility

Type of information:

experimental study

Adequacy of study:

key study

Reliability:

2 (reliable with restrictions)

Rationale for reliability incl. deficiencies:

other: No GLP but other quality assurance

Cross-reference

Reason / purpose for cross-reference:

reference to same study

Data source

Reference

Reference Type:

study report

Title:

Unnamed

Year:

2010

Materials and methods

Test guideline

Qualifier:

according to guideline

Guideline:

OECD Guideline 105 (Water Solubility)

GLP compliance:

no

Remarks:

other quality assurance

Type of method:

column elution method

Test material

Test material information

Constituent 1

Reference substance name:

Copper powder

IUPAC Name:

Copper powder

Details on test material:

Copper powder sample AK 0.1 to 0.2 µm, D50= 135 µm; oxygen : 0.3, C <0.01%

Results and discussion

Water solubility

Water solubility:

< 1 mg/L

Temp.:

30 °C

Remarks on result:

other: 14-16 days solubilization

Any other information on results incl. tables

Table3:Average water solubility of the sample 10TT02555 calculated from the 14-16 days shaking test.

	Sample code	10TT02555
		Average or range
pH		6.34-7.56
ICP Al	mg/l	<0.2
ICP Bi	mg/l	<0.2
ICP Ca	mg/l	0.3
ICP Cu	mg/l	1.0
ICP P	mg/l	<0.5
ICP S	mg/l	<1
ICP Sn	mg/l	<0.2
ICP Zn	mg/l	<0.1

 

See "Liiipo_2010_Characterisation of copper powder.doc" attached to the summary record "physical and chemical properties"

Applicant's summary and conclusion

Conclusions:

Interpretation of results (migrated information): other: Cu° is insoluble, the test demonstrates poor solubility
Copper is a metals and as such insoluble. Copper needs to be oxidized to become soluble.
The solubility was still poor (<1 mg/L) even after after rigourous stirring for 14 -16 days.
Transformation/dissolution tests and bio-elution tests are more applicable to metals and are available from the section "environmental fate and pathways -additional environmental fate" and "toxicological information - toxico-kinetics"

Executive summary:

The water solubility test was done for the sample 10TT02555. The preliminary test did not indicate any solubility for the sample.Approximately 5 g sample and 100 ml water were taken to each test.

The shaking time was 14-16 days. The sample 10TT02555 was poorly soluble.